Karim Ahmed
--- a/xfel_calibrate/calibrate.py
+++ b/xfel_calibrate/calibrate.py
+                    # forcing to convert a bool to False.
+                    # Otherwise leave the default value from the notebook
+                    # or convert to true if the bool arg is given.
+                    if consolize_name("--no-{}".format(p.name)) in sys.argv:
+                        pars_group.add_argument("--{}".format(consolize_name(p.name)),
+                                                action="store_false",
+                                                default=False,
+                                                help=helpstr,
+                                                required=required)
+                        sys.argv.remove(consolize_name("--no-{}".format(p.name)))
+                    else:
+                        pars_group.add_argument("--{}".format(consolize_name(p.name)),
+                                                action="store_true",
+                                                default=default,
+                                                help=helpstr,
+                                                required=required)